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be donated to science to study the long-term effects of concussions. that was before investigators say he shot himself in the chest. and the scientists who examined deurson's brain as well as junior. researches at boston university report they investigated brain samples from 85 people all of whom had histories of brain injuries. they claim 80% of those brains showed signs of a certain type of brain disease that cause memory loss, depression and dementia. almost all of those brains they say belong to athletes. but scientist its say they don't have enough evidence to prove that the hits on the field caused the brain disease. earlier today on "studio b," a doctor suggested we have reached a point where parents really should think twice before even allowing their kids to play football. >> parents that are watching today need to be highly suspicious and highly cautious about having their kids participate in high school football, either if they don't get the right test done, if they are not followed frequently and certainly to make sure that the right protection is put in place to at least abso
competing to win the army's next multi-million dollar contract. he showed us the science behind every shape, size, and shade of these pixels. >> you now have your camouflage. we're trying to trick the brain into seeing things that aren't actually there. >> reporter: digital patterns recreate shapes already found in nature, and 3-d layering creates depth and shad dose where none exist. that's today's design. but developers already have one eye on tomorrow. >> what's coming up down the road and very quickly is the harry potter cloak. >> what is that? >> reporter: with that fictional cloak, harry isn't just camouflaged, he's invisible. >> my body's gone! >> how invisible are we talking here? if i walked into a room with a soldier wearing one of these cloaks -- >> you wouldn't see him at all. he would be completely invisible to you. >> reporter: this isn't make believe. the military has seen the so-called quantum stealth technology. it works by bending the light around an object, even concealing most of a person's shadow. imagine what that could do for a sniper, hiding in a field, or the americ
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